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Tesla teases Model S prior to debut

Prior to its world debut on March 26, Tesla has decided to whet the appetites of green-car fans by releasing a teaser image of its upcoming Model S sedan. Under the direction of former Mazda designer Franz von Holzhausen, the Model S features a rounded front nose, a front fender plate with an affixed Tesla emblem and a noticeably shorter hoodline. Unlike the Fisker Karma, the Model S will be powered solely on battery propulsion and do without a range-extending engine, which helps accommodate the shorter hood.

AutoWeek office swag: Mazda rotary-engine keychain with realistic motion

When I got the keys to our long-term 2011 Mazda 5 last week, they came with a surprise--this aluminum-and-brass keychain in the shape of a rotary-engine housing, complete with moving rotor. The rotor doesn't just rattle around or spin in a circle. Thanks to a thumbwheel on the back of the housing, coupled with a timing gear and offset crank journal, the thing actually moves in an approximation of epitrochoidal motion just like a real Wankel.

Mercedes C-class Estate (2007): first official pictures

By Ben Pulman First Official Pictures 31 August 2007 12:08 About time the C-class Estate turned up… It is, and while the new C-class saloon has only been around for six months, it’s so good that the old outgoing estate that's been soldiering on has suddenly been left feeling very long in the tooth. Merc has responded - and today presents the new estate. It’ll be shown in the metal at September’s Frankfurt Motor Show and then go on sale in the UK in summer 2008.